| Acronym | Meaning |
| TDHF | Time-dependent Hartree-Fock Method |
| ABCM | Assembly (of) Boundary-controlled Monolayers (method For Electronic-structure Calcns.) |
| NRC | National Response Center |
| ICBN | International Code Of Botanical Nomenclature |
| VCB-CPA | Virtual Crystal Bandwidth-coherent Potential Approxn. (for Electronic-structure Calcns. On Alloys) |
| MFO | Mixed-function Oxidase |
| PAHO | Pan American Health Organization |
| GCP | Good Clinical Practice |
| LEIR | Low Energy Ion Ring |
| NREP | National Registry Of Environmental Professionals |